My girls car was recently broken into and stereo was stolen and wires cut...harness plug was left but is cut too short to reconnect wires. i have an aftermarket stereo that I have been trying to hook up. I know the power wire is the red with light blue but there is two of them, also it looks like there are two ground wires. I only have one power and one ground wire on the aftermarket stereo. how would I go about hooking this up..I have tried connecting both red and light blue wires to my yellow power wire but the unit does not power on. I also had two ground wires both connected to my ground wire and I hooked up the ignition wire to the cigarette lighter but still no go.